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In this study, the hydrodynamic properties of an unsaturated soil were estimated simultaneously from a laboratory column infiltration experiment. Soil samples were collected from the area of Mnasra in north western of Morocco. As governing equations we used the Richards equation for variably saturated flow coupled with van Genuchten model. Inverse parameter estimation approach was used in which the unknown parameters were estimated with the least-square method through implementation of the Levenberg-Marquardt algorithm. Sensitivity coefficients were examined in order to determine the most meaningful measurements for identifying the unknown hydraulic parameters. Results obtained using the measured water content data during the unsaturated soil column experiment revealed the robustness of the proposed approach
